Pump-piston



e. A. HUMASON.

PUMP PISTON.

APPLICATION FILED OCT. 11, I919.

1,3273 14, Patentd Ja1i.1 3,1920.'

2 i I 2 F 33 4 9 l ""5 6 Granmiifieflfitmason, INVENTOR. "In 7 v l l 5 v v his ATTORNEY.

UNITED. surnrns PATENT OFFICE.

GFANVILLE A. HUMASON, OF HOUSTON, TEXAS.

To all whom it may concern: a

Be it known that 'I,'GRANV1LLE A. HUMA- soN, a citizen of the United States,fresiding at Houston, Harris county, Texas, haveinvented a certain new and useful Improvement in Pump-Pistons, of which the following is a full, clear, and exact description, such as will enable others skilled inthe art to which it appertains to make and use the same. I v

My invention relates to an improvement in expanding cups or rings to be used in con-- nection with a reciprocating pump piston whereby the wear incident to the operation of the pump may be taken up without the removal of well. g I

In the operation of deep well pumps, and especially in pumps employed in the pump ing of oil or water mixed with sand or sediment occasioning rapid wear in the piston and working barrel, it is desirable that the wear may be remedied by the-expanslon of. the parts of the piston so that the tlght fit between the piston and working barrel may be maintained without the necessity of removing the parts from the. well. The expansion means used on the piston Wlll be shown'also to be adaptable for use in'lock-' ing the foot valve in the lower end of the working barrel so that itmay be removed when desired.-

The object of'my a novel. form of expanslonmeans adapted to'be expanded by the rotation of the sucker I rod connected therewith.

Referringto'the drawings forming a part of this Specification, and wherein like nu me'rals of reference are applied to like parts throughout the several views, Figure 1 is a central longitudinal lsection through. the

lower end of the working barrel of a pump showing the use of my invention both upon the piston and the foot valve of the'pump; Fig. 2 is a transverse-section on the plane 22 of Fig. '1; Fig. '3 is a similar section on the plane 3-3 of Fig. 1; Fig. 4 isa 5 m view of one of the .-metallic. disks use in connection with myexpansion means.

In the sectional view shown in Fig. 1, I have illustrated the lower end'of an ordinary working barrel A havingtherein a foot valve B and a' reciprocating :piston C.-

The working barrel A is sho e ed at i -lower end to a wash pipe, 511 meainvsp Specification of Letters Patent.

the operating 'parts from the inventionis to provide bear against a 'similar'metallic bowed. in the oppositedirection and acting I Patented Jan. 13,- 1920.

Application filed October 11 1919. Serial No. 380,058.

of a coupling 6. This'coupling is provided 1 with an inwardly extending diaphragm or flange 7 having a central opening or channel 8 therein for the passage ofthe fluid from the wash pipe 5 into the lower end of'the working barrel. 1 At each side of this central 3 I passage 8 the diaphragm has a rectangular the upper end of w ch is. attached a valve cage 12, providing in the lower endthereof a seat 13 for the upwardly openin l ballvalve 14. At the lower end of the plpe 11 of the foot valve is anut 15having on its lower face the projecting flange 10' previously described, A somewhat similar nut 16 is provided at the upper endof the pipe 11 and between these two nuts are adaptedto be clamped a plurality of expansion' devices. 4 1 The expansion means used in connection with my foot valve is identical with the means used in the-plunger-tobe later described. It comprises two compressible com-- positiqn disks or 'cus-17- -and 188 These cups being reinforce on their inner adja-' .cent ',faces by "resilient 'metallic. disks 19 which are slit radially at. 20' adjacent theirouter edges. These disks have a flat face '21'Jbearing against the expanding "disk toward the central passage 11 and are bowed or curved toward each otherat their outer marginsso that the will contact along-the" s'aidmar ins22. -T ese metallic disks ress .against t e expansion cups'so as to orce the-outer inturned edges thereof outwardly into contact with the working barrel. The upper of the two expansion cups is reinforced on -the side opposite the metallic disk by the'nut .16, which has'its lower face con,-

" caved for that purpose. The lower disk is reinforced by'a saucer-shaped metallic disk 23, the lowenface of which is ada tled 2t:

to reinforce the upper face of the expansion cup 25 adjacentthereto. The lower set of "-expansionrcups 25 and 26 are constructed in the same way as the sets 17 and .18 previously described, having the two inner metallic washers 19 and 21 acting to force the expansion cups outwardly against the I of the nut from the f helical springiffil outer endnponi I I j T P e ifih a .v

1'..flili'ently,v inward against thepipe"-'-fThe--rthejfoctfvalve just: described. The I I v I central pipe-38 providin apassagefor the the nut and iS-lprvided with 1 11" 'tudinal 1- fluid therethrougli, a" va ve. cage 39 at the I grooves '33,= whiclijextend forv a s Ortidis-ihpper end anda sucke'r-rodAO connected 'tance betweenthe' ends of thethreaded pork proximately right angles thereto; {Thus by j reference. partlcularly .to. Fig'. -3 :it will be noted that the rotation cram-1 mm right w'ardl'y against the sides of the working II hand diretcion'will beaccommodated by-the i; d, 4 I slidingof the latch ifrorn'one notch to mbut when ,1t is desired to. unscrew the nut by =a..rotation in a. counter-clogkwise .idirectiomff -xthe side ofthe' latch will contact with the' radialjfside 34 0f the groove and prevent 135 tend fthe full length o f-the threaded-portion to prevent the :{passageof liquid as't .the'; Thus whenitis desired to ,compressthe ex- I working barrel and; the --lower facelb Zthe' surface of the nut 150' 1 beveled atits inner f ace 'at 129 and having" anfouter stem"30, aboutflwhich is seated a c'tingoends 22 tobe forced outwardly thus com res'sing the; inwardly extendin ends I I a 'of,t e expansion on s 17' and 18 against the The nut is'provided with a locking dewprkin barrels I cientlyI to make a fluid vice which acts'to prevent theunscrewingI tig ht c osureg. Ijat a-jsu'sequent' time the 1mm fThisfloc *de-f closureis' -found 'to be loose,=the' wrench -atvice comprises'a 'ra 1alopening27fiinw ich tachm entfmay-again be'usedflto still ..further is seated a ratchetor latching meansada ted, compress, the exp ns'i n cups and'to tighten to bear "against thei inner pipe-1.11.9 1, he'jjthe closure; Iffit. esired'to remove the latching meansycomprisesianlinner head'-- 28f --foot valve fro llitim'ay beloosened by rotation in t pposite'directionzand a threaded -coupling ma be" attached to the readedf upper end 2 and theqfoot avalve k'jthus' be removed-from the we he construction'of my reci l V very; closely" identical wit disk 26 reinforced by the upper said I'sgr'in'g seating. atfits .hfrea' ed 9 1 2., ich, outer end of. t e opening;

ac'tsfto force the latch "28-"- I I I to said-valve, cage by means of a coupling tions'to receive" the .beveled end 29 "of the" F541." "Upper and lowernuts 42 and .43 act latchiy These grooves; are "provided with; a I radial side 34 and-another; side 35 at apof pairs ofaexpansion *compositionjdisks {14 betweenthe two nutsffand tobe forced out- -bar rel' by resilient vmetallic disks 46 ,an

I I as. previously described, -in lrelation-to the other along the .beyeled face .35 of the notch; --foot -valve.- The. lower nut 43 is {provided with a locking means 48 similar. iii-construction to the one described at, the lower; end of; the foot valve; .-This nut is. constructed "w hja quar qiii ing 4 n ally he'r'eo.;

its movement. The grooves 33 do not ex; I

thetfootj-valve-iB;

j's'quaredj upper end- 37 o nut; There'arem's willibe noted, fu threadspansionjdi'sks "between-the nuts 421-and'43,

. unmutil'ated both above and below the the f-p'i'ston isyloweredq so'ithat.-.itis. seated f preventfleakage around the nut-( .parts are placed together,

other pipe and is squaredratth I or otherrotating means.

pressing the expansion" nicans l.1

.19 and 21 er will cause th outer and-i, tlien.is*- rotated to tighten the-nut 43 at 36 Qfor, coupling with the 5 expansion cups-outwardlfi a ainst per end' at 37 for the attachine reltq cause a ti'g pistonjandthe walls .o W kin e L- he'never In the assembling of thisffpo valve;

' 1 with'the lower nut 15h sion' means looselytherebe attachment .at the lower ed into contact with the. foot fvailve,

the working barrel, and the operation of the pump may againproceed as before. By the prov sion ofthelocking means upon the nuts; 15' and 4 l3 be impossible for the nuts to become," loosened from their proper orking bazjrel until 'the flanges 10 seats the upper niit 16 andi'the .att I v v plpe 11 downwardly into the nu thus esiredl T t gh e in wus f: h e Pa s, n h

thus described I fiy'finventiomthe two nuts. The re'ssure'ofthem I I I witho t giprthe j' dese'r ipti ai I 'to compress between} the; same af plurality and 45, which areladaptedto be compressed thus-forming asflflt, adaipted to reeeive ythe The upper-e 'd [f hecag' 12 is threaded?l-uromth ,p p'e 3 VmPrISSiDg the expan' I k nsyso'asf fl fqrce'the intu l I I 'itis no 1 that here" 1 s- "e' aboutthepisto 'duetoaiwIear be operating '.parts,.the piston-may a positionbut itf awill, j however, enable the upon the -1u'pper.end -37 of the foot valve c. o'sur'e l e nd the expansion cups compressed soas to I tighten the closure between the piston and {on and? advantages of whichwill be against said working barrel.

2. In a pump, a working barrel, a piston reciprocable therein, nuts at the upper and lower ends 01" said piston, expansion means between said nuts, said expansion means comprising a series of cups having their outer ends bearing against said working barrel and their concave faces toward each other, resilient disks between said cups, said disks having their outer edges bearing against the outer edges of said cups, whereby the tightening of one of said nuts will force the cups outwardly against said working barrel.

3. In a pump, a working barrel, a piston reciprocable therein, pairs of expansion members thereon comprising flexible cups, saucer-shaped metallic disks between said cups and acting when compressed to force said cups against said working barrel.

4. In a pump, a working barrel, a piston reciprocable therein, expansion means thereon, comprising a flexible cup, said cup being held resiliently bet-ween saucer shaped metallic disks, the inner of said disks bearing against the outer edge of said cu and means to compress said cups and said disks to force said cups outwardly against said working barrel.

5. In a pump, a working barrel, 9. piston reciprocable therein, expansion means on said piston comprising flexible cups in pairs with the concaved faces toward each other, saucer-shaped metallic disks bearing against said cups, said disks being slit radially along the outer edge thereof, said outer edges bearing against the edge of the adjacent cup and means to compress said cups and said disks to force said cups against said working barrel.

6. In a pump, a working barrel, a foot valve in the lower end thereof, a piston reciprocable in said working barrel, pairs of expansion cups on said piston, resilient saucer shaped metallic disks pressing against said cups on both sides thereof, and means to force said cups toward each other, causing the concaved faces of each pair of disks to contact and expand the cups against the working barrel.

7. In a pump, a working barrel, a foot valve therein, means to lock said foot valve in said workin barrel comprisin flexible cups, disks bearing on said cups an adapted to expand the same, a piston reciprocablein said working barrel, expanding cups on said piston, nuts at the upper and lower ends of said piston adapted to compress said cups to expand the same by the threading of said piston downwardly relative to said lower nut.

8. In a pump, a working barrel, 2. foot valve therein, a squared upper nipple thereon, a piston in said workin barrel, nuts on the upper and lower ends t ereof, compressible cups between said nuts, the lower of said nuts having a recess to receive said nipple whereby the rotation of sald piston. will compress said disks and expand'the same.

In testimony whereof, I hereunto aflix my signature, this the 8th day of October, A. D., 1919.

GRANVILLE A. HUMASON. 

